This is a two-valued flag, nonBroadcast or broadcast, showing whether the Frame Relay interface is using a multicast distribution service. An admin checks it to understand whether frames sent on this interface fan out to multiple remote sites or go point-to-point, which affects how routing and replication behave over the DLCMI. For example, a hub-site interface serving a multicast Frame Relay group would read broadcast(2), while a simple point-to-point access link would read nonBroadcast(1).